Client:
City of Hannover
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In der Steinbreite, Hannover
Description
In addition to 12 classrooms, the new school construction also offers a free-time activity area, after-school care facilities and afternoon student supervision, and it provides enough space for neighborhood activities. The cafe and forum are located centrally near the entrance, creating a link between the school and the community. This area faces the school's forecourt, and can be used as an event location, a youth meeting place, or - of course - the elementary school's and after-school care group's cafeteria. When school is not in session, sports clubs can make use of the gymnasium, which is accessible via a separate entrance. The forum and stage area are designed to provide space for up to 300 event attendees.
Outside the school, the entire premises was redesigned into a multipurpose outdoor space with sports fields. Besides serving as a recess area, the space can be used in summertime for outdoor classes or events.
The entire property is a model of barrier-free accessibility: the school's indoor and outdoor infrastructures are totally handicapped-accessible, as is every room in the building.
Parties involved
Design:
SchröderArchitekten
Building data
Building type:
School for 300 students with gymnasium and common space for district activities
Location:
Hannover
Year of construction:
2008 - 2009
Heated usable space:
3507 m²
Total cost:
7.4 million euro
Subsidies:
proKlima
Building shell
EXTERIOR WALLS:
24 cm cellular concrete (heat conductivity rating 016); 16 cm mineral-fiber cavity wall insulation; facing-brick masonry; HTC = 0.15 W/(m2K)
Windows:
Wood-aluminum windows with heat-insulating triple glazing; HTC = 0.9 W/(m2K)
Roof:
gymnasium: Laminated beams with trapezoidal steel sheeting; 30 cm polystyrene insulation; bituminous sealing sheets School building: prestressed concrete slabs with 30 cm polystyrene insulation; sealing and extensive green roof; HTC = 0.11 W/(m2K)
Floor plate:
16 cm fiber-concrete floor plate with 24 cm polystyrene insulation on upper side; 2 cm footfall sound insulation; cement floor screed with linoleum flooring; HTC = 0.14 W/(m2K)
Building technology
Ventilation:
Mechanical ventilation adjusts according to building usage, ensuring comfortable rooms with consistently high air quality. Ventilation with windows is possible, but no longer necessary in general, the building's base ventilation system provides constant air circulation throughout the classrooms. Air volumes can be manually adjusted if necessary.
Heating:
Two condensing gas boilers Static heaters balance out temperature changes between different areas and help maintain the building's base temperature.
Air conditioning:
no active air conditioning The following measures were taken to help ensure comfortable summertime building temperatures:
>> Solid construction
>> Automatic exterior sun protection controlled by interior temperatures
>> Ventilation rates adjusted in classrooms to ensure building cooling at night
Measured values
AIRTIGHTNESS:
n50 = 0.3 h-1
Calculated values
Calculated method: Passivhaus planning package
HEATING ENERGY NEEDS:
13 kWh/(m²a)
TOTAL ENERGY NEEDS FOR HEATING,AIR CONDITIONING,DHW,ELECTRICITY:
Electricity
18 kWh/(m2a)
Gas
40 kWh/(m2a)
PRIMARY ENERGY NEEDS FOR HEATING,AIR CONDITIONING,DHW,ELECTRICITY:
92 kWh/(m2a)
CO2 EMISSIONS FOR HEATING,AIR CONDITIONING,DHW,ELECTRICITY:
21 kg/(m2a)
